An experimental method for fluid-solid coupling similarity simulation in confined aquifers

Abstract

The invention discloses a similar simulation experiment method of fluid-solid coupling of a confined aquifer. A confined aquifer is made in a similarly simulated overburden layer, so that the confined aquifer is located at a position set by the test in the similarly simulated overburden layer; the confined aquifer includes A water storage belt, an outer sealing belt and a water injection pipe, the outer sealing belt fully covers the inner water storage belt, and the inner water storage belt and the outer sealing belt have the same or similar mechanical strength ; The water outlet end of the water injection pipe is located in the inner water storage belt, and the water supply end of the water injection pipe passes through the outer sealing belt and leads out of the similar simulation test device. It can play a very good sealing effect on the inner water storage zone. Since the mechanical strength of the inner water storage zone and the outer sealing zone are the same or similar, it does not affect the mechanical strength of the overall rock formation, nor does it affect the rock formation after excavation. The mechanical movement can well simulate the movement law of the confined aquifer in the actual mining.

Description

technical field [0001] The invention relates to the technical field of similar simulation of mining. Specifically, it is a similar simulation experiment method of fluid-solid coupling in confined aquifers. Background technique [0002] Coal mine water damage is one of the main safety hazards in the process of mine construction and production alongside gas and roof accidents. It is very necessary to conduct targeted research on coal mine water damage. Coal mine water hazards occur for a number of reasons: unclear hydrogeological conditions of coal mines; insufficient awareness of confined floor water beneath coal seams; improper implementation of waterway exploration and drainage systems or measures taken when mine roadways are close to old goaf water and aquifer water sources Insufficient preparation; the on-site staff lack of awareness of water seepage signs and have not taken some active measures, etc. These reasons will lead to the occurrence of water hazards. Among the...

AI Technical Summary

Problems solved by technology

[0003] At present, in the prior art, there are simulation experiments on the aquifer in the shallow overburden layer. For example, in the construction of municipal engineering, the aquifer in the shallow overburden layer is usually sealed with a glass plate, and when the shallow overburden layer is disturbed The movement of the aquifer changes regularly, but when the shallow overlying soil layer moves, the water in the aquifer will flow out from the gap between the glass plate and the soil layer, which cannot realize the true sealing of the aquifer, let alone simulate the pressurized water in mining There are also similar simulation test studies on the layer; there are also foam glue or sealants used to seal between the glass plate and the aquifer, but the foam glue or sealant is bonded to the glass plate, and the shallow overlying soil layer is greatly disturbed or collapsed. When the aquifer is separated from the foam glue or sealant, the sealing effect of the aquifer cannot be achieved

Therefore, there is no relevant experimental method for confined aquifers in the prior art

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